{
  "manageEntity": {
    "action": "Save",
    "entityId": "28076533",
    "entityType": "Track",
    "nonce": "0xaa8781151e963a9e3842bf1a8bd40ab7149bd5a6bf4bd6c420ecc78738a6be36",
    "signature": "0x836a34b29d28fdbdaad62e955b8e2426069e1de26e505ce7789e5a9b997ee3c546af023fceb1b77c9518590fd730770ec0680215233988877b1c87dbca1b516d1b",
    "signer": "0x71214aDcb582235538B21960fE9660B5eb90084C",
    "userId": "50737590"
  }
}